Vizio E55-D0 help identifying "smoked" IC on main board

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  • DXseekerMO
    Badcaps Legend
    • Feb 2018
    • 1119
    • US
    #1

    Vizio E55-D0 help identifying "smoked" IC on main board

    Hi folks, I have this Vizio E55-D0 that will not turn on. After some searching I found this IC smoked on the Main Board. Unfortunately the numbers are burnt off too. The IC is board number UA5.

    Can anyone help me find a number for this? I'd appreciate it.
    Attached Files
    They call me......."threadkiller"
    Tags: None
    • petehall347
      Badcaps Legend
      • Jan 2015
      • 4426
      • United Kingdom
      #2
      Re: Vizio E55-D0 help identifying "smoked" IC on main board

      see if you can get a closer pic ..has to be in focus .

        Comment

        • DXseekerMO
          Badcaps Legend
          • Feb 2018
          • 1119
          • US
          #3
          Re: Vizio E55-D0 help identifying "smoked" IC on main board

          Thanks petehall347, hopefully one of these might work?
          Attached Files
          They call me......."threadkiller"

            Comment

            • petehall347
              Badcaps Legend
              • Jan 2015
              • 4426
              • United Kingdom
              #4
              Re: Vizio E55-D0 help identifying "smoked" IC on main board

              thats strange as i thought i could see some writing on pic 4 first lot of pics .

                Comment

                • DXseekerMO
                  Badcaps Legend
                  • Feb 2018
                  • 1119
                  • US
                  #5
                  Re: Vizio E55-D0 help identifying "smoked" IC on main board

                  I looked at a ShopJimmy picture, the printing on the top is supposed to be yellow. I can't see any of it, even with a microscope.
                  They call me......."threadkiller"

                    Comment

                    • petehall347
                      Badcaps Legend
                      • Jan 2015
                      • 4426
                      • United Kingdom
                      #6
                      Re: Vizio E55-D0 help identifying "smoked" IC on main board

                      looks like you need the schematic . will need resistor values etc for what connects to it as well .

                        Comment

                        • DXseekerMO
                          Badcaps Legend
                          • Feb 2018
                          • 1119
                          • US
                          #7
                          Re: Vizio E55-D0 help identifying "smoked" IC on main board

                          Originally posted by petehall347
                          looks like you need the schematic . will need resistor values etc for what connects to it as well .
                          Yes...looks like lots of casualties. Has anyone had any luck finding schematics for these?

                          Time to scour the webs!
                          They call me......."threadkiller"

                            Comment

                            • DXseekerMO
                              Badcaps Legend
                              • Feb 2018
                              • 1119
                              • US
                              #8
                              Re: Vizio E55-D0 help identifying "smoked" IC on main board

                              Well that went over like a lead balloon. I haven't found a thing. Vizio, release the repair information lol
                              They call me......."threadkiller"

                                Comment

                                • R_J
                                  Badcaps Legend
                                  • Jun 2012
                                  • 9535
                                  • Canada
                                  #9
                                  Re: Vizio E55-D0 help identifying "smoked" IC on main board

                                  The best picture seems to be from SJ, the ic seems to be a TI ldo, these markings look similar (this ic's pinout is different)
                                  Attached Files

                                    Comment

                                    • R_J
                                      Badcaps Legend
                                      • Jun 2012
                                      • 9535
                                      • Canada
                                      #10
                                      Re: Vizio E55-D0 help identifying "smoked" IC on main board

                                      The ic might be a Ti TPS54331 or TPS54231, the tps54231 has 12Vin, 3.3vout using a 10µH coil? Check if the resistors are close for this voltage
                                      Last edited by R_J; 09-26-2020, 09:10 PM.

                                        Comment

                                        • DXseekerMO
                                          Badcaps Legend
                                          • Feb 2018
                                          • 1119
                                          • US
                                          #11
                                          Re: Vizio E55-D0 help identifying "smoked" IC on main board

                                          Originally posted by R_J
                                          The ic might be a Ti TPS54331 or TPS54231, the tps54231 has 12Vin, 3.3vout using a 10µH coil? Check if the resistors are close for this voltage
                                          The TV is put back together for now...I have 60 TVs to tear down. It's first on the list once that's done.
                                          They call me......."threadkiller"

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